Even though Rie, who had passed her forties and was still unmarried, lived alone in her parents' home, feeling lonely. Then, her younger sister Sanae and Sanae's daughter Ruka came for their mother's seventh memorial service. For a while, the three women began living together under one roof. One day, while Sanae went out to eat with a friend, Ruka's feelings ran wild. "I really like mature women like you, Auntie..." Although Rie was bewildered by this unexpected turn of events, her body, filled with unfulfilled desires, could not resist...